1.

निम्नांकित चित्रों में कोण A की गणना कीजिए।

Answer»

(i) 

x + 2x = 180°

3x = 180°

x = 60°

2x = 2 x 60° = 120°

(ii) 

30° + x = 90°

x = 90° – 30°

x = 60°

(iii) 

x = 30° + 180°

x = 210°

(iv) 

150° + 150° + x + x = 360°

300° + 2x = 360°

2x = 360° – 300°

2x = 60°

x = 30°



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